Help with sequences going silent

Question

I  am working on my third version of a simple edit. I started with an edit 2 weeks ago and finished the 18 minute seq with 2 video tracks and 6 audio tracks. No broll just A roll. The footage is Canon 5D and the audio is from  Zoom and Tascam external recorders.
For 2 weeks the process went fine. No issues with anything. We were expecting bad weather so I powered down the system. The next day after opening the seq, no sound. The waveforms were visible and the meters moved but no sound thru the speakers. Double click and the audio played fine in the player window. The aurto saves for the project had the same sound issues.
I posted a question on this forum and recieved a few comments but still no luck.I tried an online chat which was a joke. The adobe point person did not even know whic time zone he was in. He asked three times what software I was running.
I contacted editors I know all over the country and no one could give me a suggested solution. I deleted the media cache and media files, I reconnected the media, I trashed the preferences, I tried outputting to Audition, where the sound played fine and I could edit but it would not import back into PPCC with audible sound.
No one has had a solution or even an idea how this occur.
I started a new project and imported just the sequence. NOTHING. I moved my project to an internal drive because an editor said that would help.
I started from scratch. Editing the entire 18 minutes again. Worked great. Was finishing the mix to export to AE and it crashed saying it could not be saved. Upon reopening the project. No audio just like before. AND all my auto saves were corrupted as well. No audio in any of them.
I have been editing for 30 years and have used AVID and FCP. All had issues but nothing as bad as this. It has taken 3 weeks to do a simple job. Please help me figure this out. Everyone I talked to that edits is waiting and confused as to how this could happen.
Thanks
Art

Answer 1

Kevin,
The sequences are 44.1. The zoom interviews and music are 44.1. However the Tascam is 48. There are 6 interviews total. The interview heard most is 48.
The audio when rendered played fine before the program frooze. Everything worked great until the crash.
The files play fine in the player even now.
And they play fine in the player window in Audition when exported. Yet the sequence does not play consistantly. It plays different clips that the ones that play in PP.
The same audio file from one soundbite to another does different things even though it is the same person. One bite may play, the next may not. Waveforms appear in all.
thanks,
Art